To shoot randomly on a pool table when you don't know or can't be bothered to think about what to do - and after making the pot, to convince yourself you did well, despite everyone else in the room calling you a flukey c***.

To Gasson; The act of playing a pool (or snooker) shot without due care and attention, with the hope that you may glean a reward from said action. Generally unsuccessful, but the success rate is higher than you would imagine possible.